CN103683217B - A kind of fault location protection device based on Intelligent terminal of distribution network and method - Google Patents
A kind of fault location protection device based on Intelligent terminal of distribution network and method Download PDFInfo
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- CN103683217B CN103683217B CN201310631543.9A CN201310631543A CN103683217B CN 103683217 B CN103683217 B CN 103683217B CN 201310631543 A CN201310631543 A CN 201310631543A CN 103683217 B CN103683217 B CN 103683217B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000007257 malfunction Effects 0.000 claims abstract description 31
- 238000002955 isolation Methods 0.000 claims abstract description 13
- 238000012790 confirmation Methods 0.000 claims abstract description 8
- 230000000875 corresponding effect Effects 0.000 claims description 16
- 241000272814 Anser sp. Species 0.000 claims description 14
- 230000002596 correlated effect Effects 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 206010048669 Terminal state Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 206010003830 Automatism Diseases 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
Abstract
The invention discloses a kind of fault location protection device based on Intelligent terminal of distribution network and method; power distribution network is divided at least one minimum distribution region; calculate malfunction differential values Ssum in each region; the state set-point of malfunction differential values Ssum in each region with this region is compared; if corresponding region relatively after difference meet impose a condition; then through short delay confirmation differential protection action, after differential protection action, all panel switches in this region of tripping realize Fault Isolation.Present invention fault location based on Intelligent terminal of distribution network guard method; use distribution area fault state differential principle; can Distribution Network Failure isolation time be controlled within 100ms; avoiding the shock problem that the switch life caused by conventional electrical distribution net Fault Isolation repeatedly making switch shortens and causes user, do not accessed by distributed power source is affected simultaneously.
Description
Technical field
The invention belongs to the relay protection automatic field in power engineering field, be specifically related to a kind of based on power distribution network intelligence
The fault location protection device of terminal and method.
Background technology
Modern power systems by generating electricity, transmit electricity, power transformation, distribution and user form, the power industry of China for a long time
Straight exist " retransmit, light for, the most effective " bad phenomenon, the most heavier regard generating, the construction of power transmission facility, current domestic right
Grid has been able to accomplish being accurately positioned of trouble point, and relatively ignores investment and the transformation of distribution system, causes
The unfavorable situation that power supply reliability is low, the quality of power supply is poor, consumers' opinions is big, it is further that distribution link has become China's electric power enterprise
The bottleneck problem of development.
Power distribution network is the end of whole power system, region be directly facing terminal use, and along with economic fast development, electricity consumption is born
The substantial increase of lotus, proposes the highest requirement to power supply reliability and power supply quality.After power distribution network breaks down, should be able to
Position the position of fault timely and accurately, thus promptly isolate fault zone and recover region-wide power supply, reduce as far as possible because of thing
Therefore the impact and loss that social economy and people life are caused that have a power failure.
Less pay attention to due to country before power distribution network, invest the most fewer, make the information content that distribution line can collect
Considerably less, the mode that automatic circuit and sectionaliser can only be used to cooperate within the long term realizes the automatism isolation of fault zone
With restore electricity.Although this Fault Locating Method simple in construction, reliability are of a relatively high, but there is also following serious simultaneously
Defect:
1) the disengagement failure time is longer, generally requires the time that several minutes is the most longer；2) non-faulting interval switch motion
Frequently, switch life is shortened；3) repeatedly short-circuit current rush, repeatedly stop power transmission, user is caused to be had a strong impact on；4) during looped network
Make non-faulting part full cut-off electricity once, expand accident impact scope；5) along with the access of distributed power source, power distribution network is by original
Single supply network becomes the active electric network of complicated multiple feed, becomes more difficult based on traditional Fault Locating Method
The most entirely ineffective.
Summary of the invention
It is an object of the invention to provide a kind of fault location guard method based on Intelligent terminal of distribution network, existing to solve
Fault Locating Method length break time and the big problem of coverage, provide a kind of location protection dress using the method simultaneously
Put.
In order to realize object above, the technical solution adopted in the present invention is: a kind of based on Intelligent terminal of distribution network event
Barrier location guard method, comprises the steps:
(1) power distribution network is divided at least one minimum distribution region, and in each region, the corresponding distribution of each terminal is opened
Close；
(2) malfunction differential values Ssum in each region, Ssum and the malfunction of each terminal in corresponding region are calculated
Value is relevant, and described failure state value has been reacted counterpart terminal and fault current crossed stream information and flows to information；
(3) state set-point of malfunction differential values Ssum in each region with this region is compared, if right
Difference after answering region relatively is satisfied to impose a condition, then through short delay confirmation differential protection action, tripping after differential protection action
All panel switches in this region realize Fault Isolation.
Imposing a condition as malfunction differential values more than or equal to state set-point in shown step (3).
In step (2), the computing formula of malfunction differential values Ssum is: Ssum=S1-S2-...-Sn, and wherein, S1 is
Closest to the failure state value of system power supply lateral terminal, n is the number of units of terminal in this region, and Sn is the fault of the n-th station terminal
State value；If Sn is 0 when this terminal is without crossing stream；If cross stream and direction identical with positive direction time Sn be 1；If cross stream and direction with just
Time in opposite direction, Sn is-1；Positive direction is defined as from system power supply effluent to the sense of current of load side.
Described state set-point is that the distributed power source number value put in this region adds 1, and each region was set should
During the state set-point in region, all count the number of the distributed power source of all inputs in direction downstream, described downstream direction
It is set as the direction from system power supply side to load side.
Terminal moves back situation according to the throwing of distributed power source, can automatically revise state set-point, if distributed power source pair
The switch answered is in the state of exiting, then state set-point subtracts 1 automatically.
When the failure state value of acquisition terminal, each terminal is transferred to self with directional information in GOOSE mode by crossing stream
Integrated ONU module, then uploaded to EPON network by ONU module, then by EPON network by the failure state value of this terminal with
GOOSE mode is sent to other terminal in this region, the simultaneously fault status information of other terminal in receiving area.
The technical solution adopted in the present invention is: a kind of fault location protection device based on Intelligent terminal of distribution network, bag
Include:
Power distribution network is divided into the module at least one minimum distribution region；The corresponding distribution of each terminal in each region
Switch；
For calculating the module of malfunction differential values Ssum in each region, Ssum and the event of each terminal in corresponding region
Barrier state value is correlated with, and described failure state value has been reacted counterpart terminal and fault current crossed stream information and flows to information；
For the state set-point of malfunction differential values Ssum in each region with this region is compared, if right
Difference after answering region relatively is satisfied to impose a condition, then through short delay confirmation differential protection action, tripping after differential protection action
All panel switches in this region realize the module of Fault Isolation.
The computing formula of malfunction differential values Ssum is: Ssum=S1-S2-...-Sn, and wherein, S1 is for closest to being
The failure state value of system power source side terminal, n is the number of units of terminal in this region, and Sn is the failure state value of the n-th station terminal；If should
When terminal is without crossing stream, Sn is 0；If cross stream and direction identical with positive direction time Sn be 1；If cross stream and direction contrary with positive direction time
Sn is-1；Positive direction is defined as from system power supply effluent to the sense of current of load side.
Described state set-point is that the distributed power source number value put in this region adds 1, and each region was set should
During the state set-point in region, all count the number of the distributed power source of all inputs in direction downstream, described downstream direction
It is set as the direction from system power supply side to load side；Impose a condition as malfunction differential values more than or equal to state set-point.
When the failure state value of acquisition terminal, each terminal is transferred to self with directional information in GOOSE mode by crossing stream
Integrated ONU module, then uploaded to EPON network by ONU module, then by EPON network by the failure state value of this terminal with
GOOSE mode is sent to other terminal in this region, the simultaneously fault status information of other terminal in receiving area.
Present invention fault location based on Intelligent terminal of distribution network protection device and method, be a kind of by minimum distribution region
The Intelligent feeder line automation Fault Locating Method that interior all intelligent end devices (RTU or FTU) have been coordinated, uses distribution district
Territory malfunction differential principle, compares malfunction differential values with state set-point, if corresponding region relatively after
Difference is satisfied to impose a condition, then through short delay confirmation differential protection action, and owning in this region of tripping after differential protection action
Panel switches realize Fault Isolation.Distribution Network Failure isolation time can be controlled within 100ms by the method, it is to avoid conventional electrical distribution
The shock problem that switch life caused by net Fault Isolation repeatedly making switch shortens and causes user, is not distributed simultaneously
The impact of formula plant-grid connection.
Terminal uses IEC61850 modeling, it is possible to send and receiving status information in GOOSE mode, in network transmission simultaneously
Use EPON technology, there is clear superiority.
Accompanying drawing explanation
Fig. 1 is power distribution network wiring schematic diagram；
Fig. 2 is GOOSE communication network figure；
Fig. 3 is that distribution region expands schematic diagram；
Fig. 4 is incomplete distribution area schematic.
Detailed description of the invention
Below in conjunction with the accompanying drawings and the present invention is described further by specific embodiment.
In a power distribution system, the closed set being made up of panel switches and feeder line section is referred to as distribution region.If one
All end points in region are all switches and not have interior point or all interior points be all T contact, then this region be called minimum distribution
The panel switches directly connecing load are become distribution tip by region.Power distribution network is by multiple minimum distribution regions and multiple distribution end
The tip forms.Distribution network failure location is equal to solving minimum distribution region and distribution tip fault location.
The definition sense of current is positive direction for flowing to load side from system side, i.e. electric current flows to dirty side from updrift side
To.For multi-power system select one of them power supply as system power supply, other power supply define the sense of current time as point
Cloth power supply considers.
Present invention fault location based on Intelligent terminal of distribution network guard method, comprises the steps:
(1) power distribution network is divided at least one minimum distribution region, and each terminal is correspondingly provided with panel switches；
(2) malfunction differential values Ssum in each region, Ssum and the malfunction of each terminal in corresponding region are calculated
Value is relevant, and failure state value has been reacted terminal and fault current crossed stream information and flows to information.
The computing formula of malfunction differential values Ssum is: Ssum=S1-S2-...-Sn, and wherein, S1 is for closest to being
The failure state value of system power source side terminal, n is the number of units of terminal in this region, and Sn is the failure state value of the n-th station terminal；If should
When terminal is without crossing stream, Sn is 0；If cross stream and direction identical with positive direction time Sn be 1；If cross stream and direction contrary with positive direction time
Sn is-1；Positive direction is defined as from system power supply effluent to the sense of current of load side.
(3) state set-point of malfunction differential values Ssum in each region with this region is compared, if right
Difference after answering region relatively is satisfied to impose a condition, then through short delay confirmation differential protection action, tripping after differential protection action
All panel switches in this region realize Fault Isolation.
For being positioned at the panel switches of distribution tip, when stream (i.e. overcurrent element action) being detected, true through short time delay
Recognizing this switch of tripping, this action protection is the ordinary skill in the art, does not repeats them here.
The present embodiment imposes a condition into malfunction differential values more than or equal to state set-point.State set-point is basis
The number of the distributed power source in this power distribution network section sets: if distributed power source number is as n, then definite value should be set to n+1.
Each region, when setting the state set-point in this region, all counts the number of the distributed power source of all inputs in direction downstream
Mesh, downstream direction is set as the direction from system power supply side to load side.If having new input in the most a certain minimum distribution region
Distributed power source, then all regions of this region upstream set state set-point time, also this distributed power source is calculated
Including, the downstream area in this region then disregards this distributed power source.Terminal moves back situation according to the throwing of distributed power source, can be automatic
Revise state set-point, if switch corresponding to distributed power source is in the state of exiting (jumping position and without stream), then state set-point
Automatically subtract 1.
Present invention also offers a kind of positioning protection device made in aforementioned manners, including:
Power distribution network is divided into the module at least one minimum distribution region；The corresponding distribution of each terminal in each region
Switch；
For calculating the module of malfunction differential values Ssum in each region, Ssum and the event of each terminal in corresponding region
Barrier state value is correlated with, and described failure state value has been reacted counterpart terminal and fault current crossed stream information and flows to information；
For the state set-point of malfunction differential values Ssum in each region with this region is compared, if right
Difference after answering region relatively is satisfied to impose a condition, then through short delay confirmation differential protection action, tripping after differential protection action
All panel switches in this region realize the module of Fault Isolation.
As in figure 2 it is shown, each intelligent terminal models according to IEC61850, (the fault shape when the failure state value of acquisition terminal
State information included stream information and sense of current information), according to gather electric current, voltage analog carry out in real time overcurrent element and
Directional element differentiates, and in GOOSE mode, status information is transferred to self integrated ONU module, then is uploaded to by ONU module
EPON network, simultaneously the GOOSE status information of other terminal in receiving area.Terminal is according to self and the GOOSE state of reception
Information carries out failure state value calculating and Logic judgment, is finally completed fault location and protection act.
When carrying out stream and discriminating direction: terminal arranged stream and starts definite value, when the magnitude of current gathered is fixed more than starting
Put flowing during value to make；Directional element operating criterion is as follows:
WithCorresponding relation as shown in the table:
With concrete Application Example, the present invention will be described below.
Power distribution network as shown in Figure 1, defines the sense of current such as " > " shown in.According to the definition in minimum distribution region, permissible
It is divided into 5 distribution regions and 6 distribution tips.
5 distribution region association switch conditions see table:
| Region 1 | Region 2 | Region 3 | Region 4 | Region 5 | |
| Association is opened | FTU1,2,21,22 | FTU2,3,23 | FTU3,4,24,25 | FTU4,5 | FTU25,31 |
| Close |
6 distribution tips are respectively as follows: FTU21, and 22,23,24,31,5.
The definition sense of current such as " > " shown in.According to the definition in minimum distribution region, 5 distribution regions can be divided into
With 6 distribution tips.
5 distribution region association switch conditions see table:
6 distribution tips are respectively as follows: FTU21, and 22,23,24,31,5.
As a example by distribution region 1, association switch has FTU1, and 2,21,22.Then FTU1 FTU2 to be received, the GOOSE of 21,22
Status information；FTU2 FTU1 to be received, 21,22；FTU21 FTU1 to be received, 2,22；FTU22 FTU1 to be received, 2,21.
It is illustrated in figure 3 distribution region and expands schematic diagram；Block switch important for certain on distribution line, if differential
Protection act malfunctioning switch reasons such as () mechanism blockage, in order to prevent fault incidence from expanding, can be by minimum distribution region
Expand thus form expanded scope differential protection.As it is shown on figure 3, former minimum distribution region is expanded after FTU2 malfunctioning switch, expand
Minimum distribution region association switch after great includes: FTU1,3,21,22,23.
It is illustrated in figure 4 incomplete distribution section schematic diagram；Under normal circumstances, the association switch of section 1 includes FTU1,2,
21,22.Due to FTU21,22 sides do not have power supply, failure state value to be always 0, therefore can be reduced to distribution section such as figure
Shown in situation, thus form incomplete distribution section and incomplete malfunction is differential.
The accuracy of the method fault location is verified below as a example by breaking down in region 3.
When region 3 fault, in power distribution network, the failure state value of each terminal and the malfunction differential values in each region are as follows:
Each terminal fault state value
Each area fault state differential values and operating state
| Region 1 | Region 2 | Region 3 | Region 4 | Region 5 | |
| State set-point | 2 | 2 | 2 | 1 | 1 |
| State differential values (Ssum) | 0 | 0 | 2 | 0 | 0 |
| Differential protection action | No | No | It is | No | No |
May determine that as region 3 fault from upper table, demonstrate the accuracy of this method fault location.
Claims (8)
1. a fault location guard method based on Intelligent terminal of distribution network, it is characterised in that comprise the steps:
(1) power distribution network is divided at least one minimum distribution region, the corresponding panel switches of each terminal in each region；
(2) malfunction differential values Ssum in each region is calculated, the failure state value phase of Ssum each terminal with corresponding region
Closing, described failure state value has been reacted counterpart terminal and fault current has been crossed stream information and flows to information；
(3) state set-point of malfunction differential values Ssum in each region with this region is compared, if corresponding district
Territory relatively after difference meet impose a condition, then through short delay confirmation differential protection action, this district of tripping after differential protection action
All panel switches in territory realize Fault Isolation；
In step (2), the computing formula of malfunction differential values Ssum is: Ssum=S1-S2-...-Sn, and wherein, S1 is for connecing most
Being bordering on the failure state value of system power supply lateral terminal, n is the number of units of terminal in this region, and Sn is the malfunction of the n-th station terminal
Value；If Sn is 0 when this terminal is without crossing stream；If cross stream and direction identical with positive direction time Sn be 1；If crossing stream and direction and positive direction
Time contrary, Sn is-1；Positive direction is defined as from system power supply effluent to the sense of current of load side.
Fault location guard method based on Intelligent terminal of distribution network the most according to claim 1, it is characterised in that: shown
Imposing a condition as malfunction differential values more than or equal to state set-point in step (3).
3. according to the fault location guard method based on Intelligent terminal of distribution network described in claim 2 or 1, it is characterised in that:
Described state set-point is that the distributed power source number value put in this region adds 1, and each region is at the shape setting this region
During state setting value, all count the number of the distributed power source of all inputs in direction downstream, described downstream direction be set as from
System power supply side is to the direction of load side.
Fault location guard method based on Intelligent terminal of distribution network the most according to claim 3, it is characterised in that: terminal
Situation is moved back in throwing according to distributed power source, can automatically revise state set-point, if switch corresponding to distributed power source is in
Exit state, then state set-point subtracts 1 automatically.
Fault location guard method based on Intelligent terminal of distribution network the most according to claim 1, it is characterised in that: adopting
When collecting the failure state value of terminal, each terminal is transferred to self integrated ONU mould with directional information in GOOSE mode by crossing stream
Block, then uploaded to EPON network by ONU module, then by EPON network, the failure state value of this terminal is sent out in GOOSE mode
Deliver to other terminal in this region, the simultaneously fault status information of other terminal in receiving area.
6. a fault location protection device based on Intelligent terminal of distribution network, it is characterised in that including:
Power distribution network is divided into the module at least one minimum distribution region；In each region, the corresponding distribution of each terminal is opened
Close；
For calculating the module of malfunction differential values Ssum in each region, Ssum and the fault shape of each terminal in corresponding region
State value is correlated with, and described failure state value has been reacted counterpart terminal and fault current crossed stream information and flows to information；
For the state set-point of malfunction differential values Ssum in each region with this region is compared, if corresponding district
Territory relatively after difference meet impose a condition, then through short delay confirmation differential protection action, this district of tripping after differential protection action
All panel switches in territory realize the module of Fault Isolation；
The computing formula of malfunction differential values Ssum is: Ssum=S1-S2-...-Sn, and wherein, S1 is closest to system
The failure state value of power source side terminal, n is the number of units of terminal in this region, and Sn is the failure state value of the n-th station terminal；If this is eventually
When end is without crossing stream, Sn is 0；If cross stream and direction identical with positive direction time Sn be 1；If cross stream and direction contrary with positive direction time Sn
For-1；Positive direction is defined as from system power supply effluent to the sense of current of load side.
Fault location protection device based on Intelligent terminal of distribution network the most according to claim 6, it is characterised in that: described
State set-point is that the distributed power source number value put in this region adds 1, and each region sets in the state setting this region
During definite value, all counting the number of the distributed power source of all inputs in direction downstream, described downstream direction is set as from system
Mains side is to the direction of load side；Impose a condition as malfunction differential values more than or equal to state set-point.
Fault location protection device based on Intelligent terminal of distribution network the most according to claim 6, it is characterised in that: adopting
When collecting the failure state value of terminal, each terminal is transferred to self integrated ONU mould with directional information in GOOSE mode by crossing stream
Block, then uploaded to EPON network by ONU module, then by EPON network, the failure state value of this terminal is sent out in GOOSE mode
Deliver to other terminal in this region, the simultaneously fault status information of other terminal in receiving area.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631543.9A CN103683217B (en) | 2013-11-29 | 2013-11-29 | A kind of fault location protection device based on Intelligent terminal of distribution network and method |
| PCT/CN2013/088473 WO2015078029A1 (en) | 2013-11-29 | 2013-12-04 | Fault locating protection apparatus and method based on power distribution network intelligent terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631543.9A CN103683217B (en) | 2013-11-29 | 2013-11-29 | A kind of fault location protection device based on Intelligent terminal of distribution network and method |
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| Publication Number | Publication Date |
|---|---|
| CN103683217A CN103683217A (en) | 2014-03-26 |
| CN103683217B true CN103683217B (en) | 2016-08-17 |
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| CN201310631543.9A Expired - Fee Related CN103683217B (en) | 2013-11-29 | 2013-11-29 | A kind of fault location protection device based on Intelligent terminal of distribution network and method |
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| Country | Link |
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| CN (1) | CN103683217B (en) |
| WO (1) | WO2015078029A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009454B (en) * | 2014-06-11 | 2017-01-18 | 南京电研电力自动化股份有限公司 | Power grid regional protection method |
| CN104601221A (en) * | 2014-12-30 | 2015-05-06 | 国家电网公司 | State monitoring system for merging unit and intelligent terminal |
| CN104569740B (en) * | 2014-12-30 | 2018-09-14 | 国家电网公司 | The electrical power distribution network fault location method containing distributed generation resource based on relative error |
| CN105527540B (en) * | 2016-01-06 | 2018-08-10 | 云南电网公司大理供电局 | A kind of fault detector and the matched overhead distribution network fault positioning method of distributed intelligent terminal |
| CN106154115A (en) * | 2016-06-16 | 2016-11-23 | 上海交通大学 | Distributed feed line automatization terminal and distribution line failure judgement system, method |
| CN106341744B (en) * | 2016-11-09 | 2019-10-22 | 云南电网有限责任公司昆明供电局 | A kind of system and method for testing synchronous passive optical network synchronizing characteristics |
| CN107732880A (en) * | 2017-11-03 | 2018-02-23 | 济南历源实业有限责任公司 | A kind of power distribution network distribution differential protective system and method |
| CN111597701A (en) * | 2020-05-11 | 2020-08-28 | 广东电网有限责任公司 | DG-containing power distribution network fault positioning method and system |
| CN113970686B (en) * | 2021-10-27 | 2022-08-30 | 西南交通大学 | Power distribution network fault detection method and system based on single-ended quantity protection and positioning method |
| CN113970685B (en) * | 2021-10-27 | 2022-08-30 | 西南交通大学 | Power distribution network fault detection method and system based on differential analysis and positioning method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8405944B2 (en) * | 2007-10-09 | 2013-03-26 | Schweitzer Engineering Laboratories Inc | Distributed bus differential protection using time-stamped data |
| CN101409442B (en) * | 2008-11-25 | 2010-08-25 | 中国南方电网有限责任公司 | Rapid line backup protection method with reliable selection based on wide area measuring system |
| KR101266953B1 (en) * | 2011-02-23 | 2013-05-30 | 한전케이디엔주식회사 | Power supply system and method using distributed power system |
| CN102611086B (en) * | 2012-03-27 | 2015-01-07 | 许继电气股份有限公司 | Centralized protection system and method for region distribution network |
| CN103050950A (en) * | 2012-12-12 | 2013-04-17 | 绍兴电力局 | Differential protection method applicable to power distribution network |
-
2013
- 2013-11-29 CN CN201310631543.9A patent/CN103683217B/en not_active Expired - Fee Related
- 2013-12-04 WO PCT/CN2013/088473 patent/WO2015078029A1/en active Application Filing
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| WO2015078029A1 (en) | 2015-06-04 |
| CN103683217A (en) | 2014-03-26 |
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